Lasting-machine pincers.



E. E. WINKLEY.

LASTING MACHINE PINGERS.

APPLIOATION FILED Nov. 11, 1910.

1,018,024. Patented 1181211912.

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coLuMBIA PLANOGRAPH Co.,wAsmNGTON. nA c.

E. E. WINKLEY.

LASTING MACHINE PINGBRS.

APPLICATION FILED NOV. 11 1910.

1,018,024. Patented Feb. 20,1912.

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ERASTUS E. WINKLEY, `0]? LYNN, MASSACHUSETTS.

LASTING-MACHINE PINCERS.

Specification of Letters Patent.

Patented Feb. 20, 1912.

Original application filed October 21, 1909, Serial No. 523,770. Divided and this application filed November 11, 1910. Serial No. 591,782.

To all whom it may concern.-

Be it known that I, ERAsTUs E. WINKLEY,

a citizen of the United States, residing at Lynn, in the county of Essex and State of 5 Massachusetts, have invented certain Improvements in Lasting-Machine Pincers, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to lasting machine pincers and more particularly to pincers employed on that type of lasting machine lmown as the hand method lasting machine.

This invention is shown as applied to the lasting machine of my co-pending application, Serial No. 523,770, filed October 2l, 1909, from which the present application has been divided, but the invention is not limited in its use to the type of machine illustrated.

The object of the present invention is to provide pincer jaws which will invariably seize the stock with a firm and positive grip and efectually prevent its release while being strained and drawn over the last. The jaw closing mechanism may be such as to permit a free rotation of the pincers in plaiting the upper at the toe.

In accordance with this object, one feature of the invention comprises a construction and arrangement of the jaw closing mechanism which, while permitting a free rotation of the pincers, provides for a locking of the jaws against any opening movement for the desired length of time after they have been closed upon the stock. In the preferable arrangement to eect this result the pincer jaws are pivoted together and are further connected, by means of an inverted toggle, at a point between the jaw pivot and jaw ends. Power is applied to the toggle by an actuator moving substantially parallel to the axis about which the pincers rotate, and also moving with the pincers in their rotation. As the toggle is opened and closed, it respectively opens and closes the pincer jaws. When the pincer jaws are closed on the stock the toggle arms are substantially straightened, or in alinement. An important characteristic of the inverted toggle mechanism for operating pincer jaws is found in the timing of the closure. The initial approach of the jaws is rapid while t-he final closure, after the stock has been engaged, is slow with the pressure steadily increasing until the limit of pressure is reached substantially at the point of infinite nip of the toggle. When the increase of pressure ceases, the stock is held in a steady and lasting grip. These characteristics are desirable as a quick approach saves time and a slow final closure prevents shock.

The invention, including certain details of construction and combinations of parts, will be further explained in the following description and then particularly pointed out in the appended claims.

The various features of the invention will best be understood from a description of the preferred embodiment thereof illustrated in the accompanying drawings, in which the invention has been shown for purposes of description as applied to the lasting machine exemplified by United States patents to Ladd and McFeely, No. 584,744, and Ladd, No. 597,321.

In the drawings Figure l is a side elevation of a hand method lasting machine of the type above specified with the improved pincers contemplated by the present invention applied thereto. Parts having no bearing on the present invention have been broken away and a portion of the pincer operating mechanism is shown in vertical section. Fig. 2 is an enlarged detail of the pincers in their open position. Fig. 3 is a rear elevation of the pincers, that is, looking from the right of Fig. 2. Fig. 4 is a section on the line 4-4, Fig. 3, looking in the direction of the arrows.

In the illustrated embodiment of the invention, 2 (Fig. l) is a bracket similar in its function to the bracket shown in the Ladd and McFeely patent, hereinbefore referred to, as supporting the pincers which, by the mechanisms described in the patent, have imparted to them the movements necessary to place an upper in overworked position on theV last, namely, the pulling or updraw movement, the outward or overdraw movement, and the sidewise or lateral movement, used with a rotary movement for plaiting the upper over the toe of the last. In the present invention instead of mounting the pincer bar directly in this bracket as in the patent, a sleeve 4, depending from the pincer lifting lever 5 and passing through the bracket, supports an auxiliary bracket 6 llt) which in turn is provided with a carrier S for the pincers. The carrier S is constructed so that the pincers may be mounted therein at an oblique angle to the horizontal, the direction being upward and outward from the plane of the front of the machine and preferably in the general direction of the pull in overdrawing the upper. The pincer bar 10 is rotatably journaled within the carrier S being held from displacement by an enlargement 9 on its lower end and a sleeve 11 pinned to its upper end (Fig. 2).

The pincer jaws carried by the pincer bar 10 may be constructed in a variety of ways but, as herein shown, the lower jaw 12 is conveniently formed integral with the bar l0 and the upper jaw 14 is pivotally mounted upon the pincer bar (see Fig. 4). The lower jaw l2 has pivoted thereto, by their lower ends, a pair of links 16 which extend upwardly at each side of the jaw and which overlap a second pair of links 1S similarly `mounted upon the upper jaw. The free ends of these links are pivotally connected by means .of pins 2O which extend across the pincer jaws and through all four links. The relative proportions of the links 16 and 18 are such that when the jaws are closed the links are in alinementwith each other (see Fig. l). When the jaws are open, however, the links are at an angle to each other (see Fig. 2). The two pairs of links thus form two pairs of inverted toggles which are utilized to open and close the pincer jaws. In order to actuate the toggles each of the links 16 has pivoted thereto a rearwardly and upwardly extending link 22, which are also pivot-ally connected beneath plates 24 to the squared lower end of a spool-shaped sleeve 26 which is slidably mounted upon the lower enlarged end 9 of the pincer bar. By sliding this sleeve on the pincer bar it acts through the links 22 and serves to actuate the inverted toggles. In order to operate the toggle actuator 26, the plunger 28, which corresponds to the rod, or plunger, for closing the movable gripper j aw shown in the Letters Patent hereinbefore referred to, is utilized. In the present construction the plunger 28 is provided with a diametrically arranged pin 8O which projects from each side and through slots 32 formed in the plunger supporting sleeve 4. To the ends of the pin 30 are connected the upper ends of links 34, the lower ends of which are in turn connected to bell crank levers 36 mounted upon a pivot pin 38 fixed to the lower end of the sleeve 4. The bell cranks 86 are provided with rolls 40 which engage between the collars of the spool-shaped sleeve 26.

In the operation of the pincers which is in all essentials similar to the operation described in the Ladd and McFeely patent hereinbcfore referred to, the plunger 28 is moved downward through the sleeve 4 to close the pincer jaws. This operation causes the bell crank levers 36 to swing about their pivot 38 carrying with them the sliding actuator 26 which acts upon the links 16 of the inverted toggles connecting the pincer jaws moving these links downward about their pivot upon the pincer jaw 12, and causing the aws to close, as shown in Fig. l. trated, the toggles are mounted upon the jaws at a point intermediate the pivotal jaw connection to the pincer bar and their gripping faces. This construction provides an extremely simple method of actuation for the toggles and an operating device in which wear of the parts will not perceptibly effect the gripping power of the pincers. The mechanism for closing the jaws, justdescribed, provide for a rapid approach and a slow `final closure, both of which features are desirable as the former saves time and the latter prevents shock as the jaws close upon the stock. Obviously a single toggle could be employed but a pair is used to insure an even pressure, over the whole surface of the gripping faces, when the stock is seized.

In its operation the machine is substan tially similar to the machine described inthe Letters Patent hereinbefore referred to. .An updraw movement is imparted to the pincers by means of the lever 5 which is actuated by a cam path in the cam 96 (Fig. l) mounted on the main driving shaft 43. An overdraw movement is imparted to the pincers by means of the longitudinally movable shaft 97 actuated in one direction by the cam 98 and in the other by the spring 99. The pincers may also have a lateral movement imparted through the rod 50 and a turning movement imparted through the rod 70, the rack 74 and pinion 76 to the rock shaft 7 8 which is connected by a universal joint 82 to the upper end of the sleeve l1. The lateral and the turning movement which form no part of the present invention, are produced by mechanism which is fully described and illustrated in the co-pending application, Serial No. 523,770.

While it is preferred to employ the speciiic construction and arrangement of parts shown and described since this con struction is the simplest and most efficient embodiment of the invention which has yet been devised, it will be understood that this construction and arrangement is not essential except so far as it is speciied in the claims, and may be varied or modified without departing from the broader features of the invention.

lVhat is claimed as new is l. A lasting machine, having, in combination, a pincer bar, a pincer jaw rigid therewith, a second pincer jaw pivoted on It will be noted that, as illust the bars, a toggle connecting the two jaws, and means supported independently of the toggle to actuate the toggle whereby the jaws may be opened and closed, substantially as described.

2. A lasting machine, having, in combination, a pincer bar, a pincer jaw rigid therewith, a second pincer jaw pivoted on the bar, an inverted toggle connecting the two aws at a point intermediate the pivotal connection to the bar and their gripping faces, and actuating means mounted on the pincer bar operating to close the jaws when the toggle is straightened, substantially as described.

8. A lasting machine, having, in combination, a pincer bar, a pincer jaw rigid therewith, a second pincer jaw pivoted on the bar, an inverted toggle connecting the two jaws, a sliding toggle actuator on the pincer bar, a link connecting the toggle and actuator, and means to operate the actuator, substantially as described.

4. A lasting machine, having, in combination, a pincer bar, a pincer jaw rigid therewith, a second pincer jaw pivoted on the bar, a toggle connecting the two jaws at a point intermediate the pivotal connection to the bar and their gripping faces, and means supported independently of the toggle to actuate the toggle whereby the jaws may be opened and closed, substantially as described. j

5. A lasting machine, having, in combination, a pincer bar, a pincer jaw rigid therewith, a second pincer jaw pivoted on the bar, a toggle connecting the two jaws at a point intermediate the pivotal connection to the bar and their gripping faces, and an actuator for the toggle to open and close the jaws mounted on the pincer bar, substantially as described. f

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ERASTUS E. WINKLEY. Witnesses:

WARREN G. OGDEN, BRToN W. CARY.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

